/* * Copyright © 2011,2012 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Google Author(s): Behdad Esfahbod */ #include "hb.hh" #ifndef HB_NO_OT_SHAPE #include "hb-ot-shaper-indic.hh" #include "hb-ot-shaper-indic-machine.hh" #include "hb-ot-shaper-vowel-constraints.hh" #include "hb-ot-layout.hh" /* * Indic shaper. */ static inline void set_indic_properties (hb_glyph_info_t &info) { … } static inline bool is_one_of (const hb_glyph_info_t &info, unsigned int flags) { … } /* Note: * * We treat Vowels and placeholders as if they were consonants. This is safe because Vowels * cannot happen in a consonant syllable. The plus side however is, we can call the * consonant syllable logic from the vowel syllable function and get it all right! * * Keep in sync with consonant_categories in the generator. */ #define CONSONANT_FLAGS_INDIC … static inline bool is_consonant (const hb_glyph_info_t &info) { … } #define JOINER_FLAGS … static inline bool is_joiner (const hb_glyph_info_t &info) { … } static inline bool is_halant (const hb_glyph_info_t &info) { … } struct hb_indic_would_substitute_feature_t { … }; /* * Indic configurations. Note that we do not want to keep every single script-specific * behavior in these tables necessarily. This should mainly be used for per-script * properties that are cheaper keeping here, than in the code. Ie. if, say, one and * only one script has an exception, that one script can be if'ed directly in the code, * instead of adding a new flag in these structs. */ enum reph_position_t { … }; enum reph_mode_t { … }; enum blwf_mode_t { … }; struct indic_config_t { … }; static const indic_config_t indic_configs[] = …; static const hb_ot_map_feature_t indic_features[] = …; /* * Must be in the same order as the indic_features array. */ enum { … }; static bool setup_syllables_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer); static bool initial_reordering_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer); static bool final_reordering_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer); static void collect_features_indic (hb_ot_shape_planner_t *plan) { … } static void override_features_indic (hb_ot_shape_planner_t *plan) { … } struct indic_shape_plan_t { … }; static void * data_create_indic (const hb_ot_shape_plan_t *plan) { … } static void data_destroy_indic (void *data) { … } static indic_position_t consonant_position_from_face (const indic_shape_plan_t *indic_plan, const hb_codepoint_t consonant, const hb_codepoint_t virama, hb_face_t *face) { … } static void setup_masks_indic (const hb_ot_shape_plan_t *plan HB_UNUSED, hb_buffer_t *buffer, hb_font_t *font HB_UNUSED) { … } static bool setup_syllables_indic (const hb_ot_shape_plan_t *plan HB_UNUSED, hb_font_t *font HB_UNUSED, hb_buffer_t *buffer) { … } static int compare_indic_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb) { … } static void update_consonant_positions_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) { … } /* Rules from: * https://docs.microsqoft.com/en-us/typography/script-development/devanagari */ static void initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan, hb_face_t *face, hb_buffer_t *buffer, unsigned int start, unsigned int end) { … } static void initial_reordering_standalone_cluster (const hb_ot_shape_plan_t *plan, hb_face_t *face, hb_buffer_t *buffer, unsigned int start, unsigned int end) { … } static void initial_reordering_syllable_indic (const hb_ot_shape_plan_t *plan, hb_face_t *face, hb_buffer_t *buffer, unsigned int start, unsigned int end) { … } static bool initial_reordering_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) { … } static void final_reordering_syllable_indic (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer, unsigned int start, unsigned int end) { … } static bool final_reordering_indic (const hb_ot_shape_plan_t *plan, hb_font_t *font HB_UNUSED, hb_buffer_t *buffer) { … } static void preprocess_text_indic (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer, hb_font_t *font) { … } static bool decompose_indic (const hb_ot_shape_normalize_context_t *c, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b) { … } static bool compose_indic (const hb_ot_shape_normalize_context_t *c, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab) { … } const hb_ot_shaper_t _hb_ot_shaper_indic = …; #endif
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